Type-writing machine.



O. PFEIFFER.

TYPE WRITING MACHINE APPLICATION FILED SEPT. 26, 1907.

Patented Apr. 30, 1912.

4 SHEETS-SHEET 1.

COLUMBIA PLANDGRAPH CO WASHINGTOPh D. c.

0. PFEIFFER. TYPE WRITING MAGHINE.

APPLICATION PILED'SEPT. 26, 1907.

Patented Apr. 30, 1912. I

4 BHEETS-SHBET 2.

WITN ESSES INVIENTEI fan? 1/ 1" Q l I IAM ATFEIRNEYS COLUMBIA PLANODRAPHCm. WASHINGTON. D. C.

0. PFEIFPER.

TYPE WRITING MACHINE. APPLICATION FILED SEPT. 26, 1907.

Patented Apr. 30, 1912.

4 SHEETS-SHEET 4.

UNTTED STATES PATENT OFFIQE.

OTTO PFEIFFER, F CAssEL, GERMANY.

TYPE-WRITING MACHINE.

To all whom it may concern:

Be it known that I, OTTO PFEIFFER, government otficial, a subject of theGerman Emperor, residing at let Kaiserplatz, Cassel, Germany, haveinvented certain new and useful Improvements in Type-Writing Machines;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The invention relates to that class of typewriting machines, in whichthe types are arranged on a cylinder having a striking movement againstthe platen and at the same time a. rotary and a longitudinal shiftingmotion whereby the desired type is positioned. Typewriting machines ofthis class heretofore in use were of minor efficiency, because they hadneither the easy and quick work of the type bar machines, nor theireffect in printing several copies at a time. However this inferiority isnot a necessarily inherent quality of the said system. For a typecylinder having a greater mass, but making shorter ways, can be moved asrapidly, and, when the same power is spent, can have the same printingeffect as a type bar, having a smaller mass, but moving a largerdistance and acquiring a larger final velocity. However, to obtain goodresults, the mechanism transmitting the force from the keys to theoperating parts of the machine should be as simple as possible, and themovements for positioning the proper type, which are useless for theprinting effect, should consume as little as possible of the spentpower. The type cylinder machines heretofore in use are not constructedaccording to those principles.

Now, the object of the improvement is to provide a machine of thisclass, in which due regard is paid to the principles stated, whereby amachine of high etliciency is produced.

The invention, therefore, consists in constructing a machine of thisclass according to the aforesaid principles.

The invention also consists in certain de tails of construction whichwill appear from the following description and which are pointed out inth claims forming part of this specification.

For the purpose of explaining the invention, an example of a machineembodying Specification of Letters Patent.

Application filed September 26, 1907.

7 Patented Apr. 30, 1912.

Serial No. 394,604;

the same is illustrated in the accompanying drawings, in which Figure 1,is a side elevation of the machine showing the mechanism for rotatingthe type cylinder, Fig. 2, is a horizontal cross section of the machineshowing the key levers, Fig. 3, is a vertical sectional elevation of thetype cylinder support, Fig. 4 is a side elevation of the mechanism foreffecting the vertical adjustment of the type cylinder. Figs. 5, 6 and 7show a modification of the mechanism for adjusting the type cylinder inan axial direction, Fig. 8 shows the stop work of the positioning frame,Figs. 9 and 10 show details of this stop work, Fig. 11 is a perspectiveview of parts of the machine, illustrating the cooperation of themechanisms, and Fig. 12 shows the different surfaces or slopes of thekey levers.

The same numerals have been used to indicate corresponding parts in allthe views.

The machine comprises three main fulcrums a, Z) and c.

a is the fulcrum of the printing frame, 7) is that of the positioningframe, and the shaft 0 affords a common fulcrum for all the key levers.The printing frame consists of two parts rigidly connected to eachother, 2'. c. the type cylinder support (Z with the shaft 0 securedthereto and the frame 7 extending laterally below all the key levers.The frame f is pivotally supported on brackets g-g located on the baseof the machine. It is actuated directly by the key levers resting on itsupper edge, Figs. 1 and 11. From the frame motion is derived to actuatethe feeding mechanism for the platen and the color ribbon, and forraising the latter at the moment of printing. These parts are notrepresented in the drawings, because they do not form a part of thisinvention.

On the depression of a key, the key lever presses the frame f down andthe type cylinder strikes the platen. After the impression is made, theprinting-frame is moved back to its normal position by a spring 60, Fig.1, connected by a wire 61, to an'arm 'r' of the printing frame 7. In theposition of rest, the action of the spring operates nearly in thedirection of the radius of a circle, described by all the' parts of theoscillating type cylinder support d and the frame f around the axis a,Figs. 1 and 11. Therefore the resistance of the spring is very small atthe beginning of its deformation and increases by and by, whereby aneasy starting of the printing frame is obtained, even if the spring bestrongly bent.

The type cylinder has a rotary and a lonn'itudinal motion on the shaft(3 fixed to the type cylinder support (Z. The latter and the shaft 6have axial bores through which the t-y )e cylinder shaft passes. Thelatter has a circular cross section at its upper end, where it guided inthe shaft (2 (Fig. It has a square cross section at its lower end andextending through a small. plate 8, which has a corresponding squareopening, and rigidly secured to a pinion 7c. The latter, with its lowercylindrical part 9, is located in the bottom part of the type cylindersupport: (Z. The pinion Z; and its ey lindrical part- 9 are made with alongitudinal opening through which the shaft .2 eX tends with some play,so as to have contact only with the guiding plate 8. The shaft 2 cantherefore be moved longitudinally with in the pinion 7'2, but it mustfollow the retation of said. pinion. To prevent the pinion 7.1 fromfollowing the upward movement of the shaft .2, the cylindrical part 9 isprovided with an annular groove, engaged by a screw 10 At the upper endof the shaft the type cylinder 32 is mounted by means of a bail likewire G l, Fig. 1, and a clamping piece 65, whereby the type cylinder canreadily be removed. By the mechanism described, all the rotary andlongitudinal motions of the shaft 2 are communicated to the typecylinder.

A toothed. sector it pivotally supported on a pivot i of the typecylinder support (Z is in engagement with the pinion b. When the sector1 is moved out of its normal position forward or backward, the typecylinder receives rotation in one or the other direction amounting;- upto 180. The point of engagement of the sector 72. with the pin ion 7.:lies in the axis of oscillation of the printing fran'ie f. In the sameaxis, but on the outside of the sector 72, the connecting rod Z ispivoted, Figs. 1, 2 and. 11, by which the circular-positioningmoven'ients are communicated to the sector and, consequently, to thetype cylinder.

The positioning motions of the sector it and the type cylinder areeffected and limited by a positioning frame 172- (Figs. 1, 2 and 11),pivotally mounted on standards of the frame the machine. Thepositioningframe 772., which must be very light, but perfectly rigid,has different arms 66, 67, 68, 69, 7'0, between which rods or bars 0 and7) are mounted. Above these bars, the keylevers are provided withdownwardly extending; projections, having faces inclined to differentdegrees. The engaging faces of the projections of the key-levers abovethe bar 0 are inclined in a direction opposite to that of theprojections located above the bar 7), as shown in Figs. 11 and 12. Onthe depression of a hey-lever, its inclined face striltes the bar 0 or7) and burns the frame at to the right or to the left aroiiind .itspivots 7), which motion is greater or smaller ac cording to the slope ofthe projection of the actuated heydever. At the rear of the slopes ofprojections of the key levers, ac tuatina' the bars 0 and 7), a slotprovided, which is substantially straight. Therefore the positioningframe is stopped in a certain linal position although the depression ofthe hey-lever contiinics.

The connecting rod Z pivoted at one of its ends to the central arm ()8of the positioning frame in, and at the other end at T1 to the sector71, l iggs. l, 2 and 11, so that all the movements of the positioningframe in one or the other direction must cause corresponding); motionsof the sector and retations of the type cylinder. On account of thepivotal connection of the positioning frame and the sector, the saidmovements may be effected simultaneously with the os cillation of thetype cylinder.

ll' hile the positioning frame and consequently the sector and the typecylinder are in their positions of rest, the pivot 72 (Fig: 11),connecting the rod Z with the sector 71 is located exactly in the axisof oscillation of the printing frame and type cylinder support.lllherefor-e the oscillation of the latter parts has no influence on.this point and on the connecting rod Z. if, however, the rodv Z, by thepositioning motions is caused to move to the right or to the left, thepivot T52 is also moved out of the aXis of oscillation of the nfintingframe, so that a circular motion around the latter is imparted thereto.This motion is the greater, the more the pivot '72 is out of the centerof oscillation. If, however, the positioning frame, and thereby also theother pivot 71 of the rod Z is locked by a key, the pivot 72 and the rodZ can oscillate only around the pivot 1. Therefore the pivot 72 must dcviate slightly from the circular way around the axis of oscillation ofthe printing frame, by which means the position of the sector andconsequently that of the type cylinder is influenced. However, thisinfluence of the oscillating motion on the positioning motion isfinished as soon as the two pivots 71 and '72 are in line with thecenter of oscillation of the printing frame f. Now, as nearly aspossible, the parts are so arranged, that the pivots have this positionfor all the positioning movements, when the type cylinder is near theplaten, and as the type cylinder must have. this position at the lastmoment of its oscillation, the oscillation of the printing frame f andthe type cylinder support (Z influences the positioning motions solittle as not to be of importance.

In order to move the positioning frame m, the sector it and the typecylinder back into their normal positions, a retracting spring 73 isprovided, which is attached to the frame of the machine and connected toan arm 74; 0f the frame m by a wire "9. This spring actuates the frame min the direction of a radius of the circular motion of the frame aroundits fulcrum 6. Therefore the same spring pulls the frame m back into itsnormal position, in whatever direction it had been impelled. Moreover,an easy starting is obtained, because the resistance of the spring isZero at the beginning and increases by and by.

When the key levers are released, the type cylinder and the positioningframe m, by the momentum they have acquired, may sometimes swing beyondtheir normal positions. In order to avoid this and to obtain the exactnormal position of the frame m instantaneously and without anyvibration, as is required to secure an exact engagement of the slopes ofthe key-levers with the bars 0 and 7), a stopping mechanism is provided, which is shown in Figs. 1, 2, 8, 9 and 10. This stoppingmechanism consists of the arm r fixed to the printing frame f and havingtwo laterally projecting flanges s and t engaging corresponding flangeso and w of a stopping piece u secured to the cen tral arm 68 of thepositioning frame m. Springs 00 and y extend into notches of the flangess and t between 8 and "u, w and t repectively so that in the normalposition in which .9, t and v, w are in the same plane, the frame m islocked. When the arm 1* rises (Fig. 8), the springs 00 and y expand, soas to unlock frame 712., as shown in Fig. 8. On the return stroke of theprinting frame f and its arm 1", the stopping pieces 8 and t slide alongthe springs 00 and y and, through the intermediary of these springs,actuate the pieces '0 and so as to accelerate their return movement tothe position of rest. As soon as the arm r has returned to its normalposition, the springs 00 and g are inclosed again between the parts '0,w and 8, 25, respectively, and the positioning frame m is thereforelocked. The stopping of the frame is effected without any shock, becausethe intermediate pieces 00 and y are elastic. This result has notheretofore been obtained.

As will readily be understood from Fig. 12, the slopes of the key leversactuating the bars 0 and p of the positioning frame m, are so formed asto effect the oscillation of this frame and the rotation of the typecylinder as near the end of the depression of the key lever, aspossible. Only a considerable rotation of the type cylinder is required,and therefore the whole depression of the key lever is used to rotatethe type cylinder, the

rotative movement starts soon after the beginning of the depression ofthe key. However, it is always necessary for the printing frame at firstto make a certain way with out simultaneous rotative motion, in orderthat the arm r may rise sufliciently to disengage the springs 00 and 3and the positioning frame m. The characters are so arranged on the typecylinder that for printing the letters most frequently used the shortestrotary motions of the type cylinder are required. As these smallmovements always take place near the end of the depression of the keylever, the rotary return movement of the type cylinder into its nor malposition is rapidlycompleted for most of the depressions, and thereforea new key may generally be depressed without waiting for the printingframe to have moved back to its normal position.

The differentvertical positions of the type cylinder are caused by thelongitudinal dis placements of the type cylinder shaft The shaft 2 isengaged at its bottom part. by a foot 4: (Fig. 3), the upper part ofwhich is made with a fork like portion through which the shaft 2extends. The lower end of the shaft 2 is conical and is supported on thebottom of the foot 41; by a collar 3 the position of the shaftrelatively to the foot is secured. A sliding piece 5, having a slidingengagement, by its slots 6 and 7, with the type cylinder support (Z, isprovided, at its lower end, with two pins 20, 21 passing through thefoot 4. The latter is adapted to move 011 the pins 20, 21, and,furthermore, it may be moved to different vertical positions by shiftingthe whole sliding piece 5. The latter is moved by the shifting keylevers 11 and 12. These levers are provided at their ends with pins 11and 15 engaging arms 16 and 17 projecting laterally from the slidingpiece 5 to different distances and located at different heights. Thelever 12, engaging the lower flange, moves the sliding piece 5 as far asis permitted by the slots 6 and 7. Therefore, by adjusting thedisplacement of the sliding piece 5 the upward movement of the lever 12is determined. The displacement of the sliding piece 5 caused by thelever 11 is only one half of that caused by the lever 12. During thesaid upward movement, the pin 1st engages within a slot 18 of the arm16, and the opposite end of the pin 14, serving for limit ing themotion, abuts against a stopping pin 19 fixed to the printing frame f,whereby the sliding piece is stopped in its final position. The loweredges of the arms 16 and 1.7 are so located, that the points ofengagement of the pins 14: and 15 with the edges of the arms are exactlyin the axis of oscillation of the printing frame f, when moved to theend of the shifting motions, as shown in Fig. 1 representing the finalposition effected by shifting the lever 11. [is the points of engagementof the shifting levers and the arms of ti e sliding piece at their endpositions are in the center of oscillation of the frame at, where nomotion takes place, the oscillation of the printing frame and the typecylinder su iport cannot cause a motion of the sliding piece, and thereis no friction between the oscillating parts and the shifting le 'erswhen in their end. positions. lily the said devices three ditterentvertical positions of the type cylinder are possible. Nevertluless atype cylinder having six rows of types is provided. in a. practic; lmachine, at least: one third of all the characters must be written bydepressing a single key; therett'ore two rows of types must always be inaction. also when no shifting lever is actuated, and the type cylindermust move lon itudinally on the depression of certain l s withoutsimultai'ieously actuating a shit ing lever. For this purpose the footl, lci -3 and i. is shifted downward on the pii 2t) and E21 by a link22. By the latter the type cylinder is moved downward a distance equalto the distance of two rows of types. while the shifting levers more thetype cylinder upward to an extent equal to two or four times thedistance of two rows of types. in the position of rest the second typerow from the top is in front of the platen; if one of the shifting eversis actu ated, the fourth row is brought into the field of action, whileby the other shifting lever the sixth row is broughtinto the operativefield. And if simultaneously the foot 4t is shifted. the npinost, thirdor fifth row is positioned.

it is evident that sometimes the type cylinder is raised by the shiftinglevers as far as two or four rows, ant. at the same time lowered as faras one row by actuating the foot l. is the displacements of the typecylinder eitlectcd by ihc link 22 must take place indcpei'idcntly of theshifting n'iotions and simultaneously with the latter, the link 22 mustbe equally actuated, whatever the position of the sliding iicce 5 maybe. For thi reason a jointed parallelogrannnic frame 23, 2 26 isconnected with the link 22. lly the lever 27 the parallelogram iscompressed until all of its parts are in line with one another, in whichposition the said parts are also in line with the shaft of the typecylindc it lever 27, Figs. 1, 2 and 313, having a sliding motion in aslot 28 upon the shifting motions always receives an equal impulse, andas, on the coi'npression ot the parallelograin, all. the points of thelink Ql Q make the same way, the lever 27 may be engaged at any pointbetween 2 t and 25. By a spring 29 the jointed parallelogram isretracted to its normal form. To the lever 2'? a frame extending belowall the key levers is rigidly secured, which is pivotally mounted, atthe points 30, 81., 32, 33, on the frame 7, and is provided with twobars 3st, placed in the axis of oscillation of the frame f. All the keylevers when depressed strike these bars except those which are notchedabove the bars. It is evident that when an, unnotched key lever isactuated, it presses the bars 34-, 35 down, and therefore turns theframe around its axis 30, 31, 32, 33, causes the lever 27 to actuate theparallelogram, moves the foot 4: of the type cylinder shaft down, andthereby shifts the type cylinder downward to an extent equal to thedistance of two rows of types.

fill type wheel machines need a device socuring the exact radialposition of the type cylinder and correcting slight inaccuracies of thepositioning mechanisms. In the present case this adjustmentis obtained,as usually, by a toothed positioning wheel 36 engaged by a dog 8'.However, in the present case, the positioning wheel is rigidly fixed tothe type cylinder, so as to follow the longitudinal displacements of thelatter. It musttherefore he engaged by the dog at different points. Inthe lower positions of the type cylinder the. wheel 37 is nearer thecenter of o; illation of the type cylinder support than in its upperpositions, so that its path is shortei'ied accordingly. ln order tosecure the correct engagen'ient of the wheel with its dog in any case atthe end of the same angular motion of the printing frame, a. device isprovided, whereby the dog is moved toward the positioning wheel to anincreasing CX- tout, the lower the wheel is placed. For this purpose thedog is pivoted at its upper end in a guiding block 38, and it isimpelled by means of a ram 39 and lover -10 immediately before theimpression takes place.

The operation of the machine is as follows. Upon depressing a key, thekey lever engages at first the framef so as to push the same downward,and causes the type cylinder to begin its oscillation toward the platen(3-3. Thereby the arm r, Figs. 1, 2, 8 and 9, with its locking pieces 8,

v t rises and the springs 00, 3 and the positioning frame at areunlocked. Now, the inclined face of projection of the key lever engages,sooner or later according to its form, the bar 0 or 72, Figs. 1, 2 and11, and, by further depressing the key, moves the positioning frame 112-to the right or to the left out of its normal position. By theconnecting rod Z this motion is communicated to the sector It, so as toswing the same to the right or to the left a ccording to thedisplacement of the positioning frame. Thereby the pinion 7a is rotatedin one or the other direction, which motion is transmitted to the typecylinder by the intermediary of the type cylinder shaft .2, the clampingpiece ()5 and the fork (it. The rotation of the type cylinder continuessimultaneously with the further motion thereof toward the platen, untilthe bar 0 or 29 engages the straight slot of theslope of the key lever.Now the final position of the positioning frame and of the sector isobtained, and the rotary motion of the type cylinder is finished. But atthe same time the printing movement is almost completed, the typecylinder being near the platen and the ratchet,

36 in front of the dog 37. The ram 39 of the type cylinder supportstrikes the lever 40, the dog 37 engages one of the teeth of the wheel36, and the type cylinder strikes against the paper. If the actuated keylever has a notch above the bars 34, 35, and if no shifting lever isdepressed, a type of the second row from the top is printed. If a keylever having no notch is actuated, apart from the said motions, the bars34, 35 are pressed down by the key lever, the lever 27 is actuated, theparallelogram 23, 24, 25, 26 is compressed, the type cylinder is loweredto an extent equal to the distance of two type rows, and a type of thefirst row is printed. If one of the shifting levers 11 or 12 isdepressed, as stated before, a type of the third and fourth, or of thefifth and sixth row is printed. Upon releasing the key, the typecylinder swings backward into its normal position under the action ofthe spring 60. As soon as the dog 37 unlocks the toothed wheel 36, thespring 73 retracts the positioning frame 112. and with it the sector itto their normal positions, whereby also the type cylinder is rotated toresume its normal position. The return of these parts to the exactposition of rest is accelerated and secured by the arm 7, whose lockingpieces 8 and t slide along the springs 00, y and finally inclose thelatter between themselves and the locking pieces 2; and w. The backwardmotion of the printing frame is limited by limiting the upward motion ofthe key levers guided in slots on the front part of the machine. TV henan unnotched key lever has been depressed, and therefore the partslowering the type cylinder to the extent of a type row have also beenactuated, the said parts, on releasing the key lever, are brought intotheir normal positions by the spring 29, which expands the parallelogram23, 24, 25, 26, and thereby pulls upward the foot 4 of the type cylindershaft 2, the latter and the type cylinder, and causes the lever 27 withits frame and the bars 34, 35 to return to their positions of rest. Thereturn of the shifting mechanisms 5, 11 and 12 is effected by their ownweight, the raised sliding piece 5 with the type cylinder and its shaft2 moving downward on releasing the shifting key lever, which motion maybe accelerated by means of a retracting spring.

As all key levers actuate the same positioning frame m, the frame mmight be hurt upon depressing several keys simultaneously.

To avoid this, the shaft 0 is not arranged so as to pass through the keylevers, but the latter are provided with circular notches pressedagainst the shaft by a cross bar 41 extending below all the key levers,and by the springs 42, 43. If by simultaneously depressing several keysconsiderable force is exerted in the direction of the key levers, thelatter will slip out of their normal positions. Then the force ceases,the key levers slide backward to their normal positions.

As the positioning frame we moves both forward and backward, its bars 0and 29 cannot always be in contact with the inclined portions of the keylevers, but there must be some play in order to permit of the oppositemotion, which play, however, on the depression of a key lever, causes ashock on the positioning frame. To avoid this and to obtain an easyoperation of the positioning mechanism, the latter comprises twoseparate parts instead of one, each cooperating with its own set of keylevers. The said key levers are alwaysin contactwith their respectiveframe sections. The said construction is illustrated in Figs. 5 to 7 ofthe drawings. The two frame sections 44 and 45 are connected by links46, 47, having a common pivot engaged by the connecting rod 1.. When theframe 44 is actuated, the link 47 swings around the pivot 48, and therod 1 is moved forward; if however the frame 45 is actuated, the link 46swings around the pivot 49, and the rod is moved backward. However, on avery rapid depression of the key lever, the resistance offered by thetype cylinder might, under certain circumstances, move the common pivot50 diagonally downward, so as to take along the other frame notactuated. Therefore the unactuated frame must be locked. This may beeffected, in a simple manner, by means of locking pieces. However, inthe example illustrated a mechanism is provided, whereby, simultaneouslythe type cylinder is locked in its position of rest, which mechanismreplaces the locking means 1", s, t, o, w, 00 and y, shown in Figs. 1,2, 8, 9 and 10. The pivot bolt 50 connecting the links 46 and 47 has asliding engagement on both sides in slots 51 of guid ing plates 52 and53. These slots are so shaped, as to guide the pivot 50 in circles,either around the pivot 48 or around the pivot 49, and to prevent thesame from slipping downward. At its central part, the slot 51 shows anupwardly extending portion. When the parts return into their normalpositions, the pivot bolt 50 is drawn upward into said upward extensionby means of a spring. not represented in the drawings, so as to preventthe same from moving beyond its position of rest.

'When the pivot bolt 50 slides in the slots greater or less according tothe resistance opposed by the inertia of the type cylinder. Thisfriction may be reduced by the device illustrated in Fig. 7, a pivotingguide being provided instead of a fixed one. The slotted guide 51 issubstituted by a guide hook at having a notch or slot engaged by thebolt 50. The pivot of said hook has the same position as the pivot 4-8in Fig. 5. A second hook, which is not represented in Fig. 7, isprovided to guide the pivot when moving in an opposite direction. Thehooks are mounted. on fixed supports arranged sidewise of the links to,4:7, only one of said supports being represented in Fig. 7. As soon asthe pivot bolt 50 returning to its normal posi tion slides out of theslot of the hook o l, it is received by the fixed guides 57 secured tothe supports 56, whereby it is stopped in its normal position in thesame manner, as rep resented in Fig. 5. T he two positioning frames a land may also be mounted on the same shaft, in which case the linkmechanism is arranged in the form of a parallelogram instead of an iVlIf it is desired. to make several copies at a time, the type cylinder ispreferably made of metal. In this case, however, the weight of thecylinder must be reduced in order to decrease its inertia. Such a typecylinder may be made in the following manner. The types are im pressedin a thin metal cylinder so as to ap pear prominent on the outside, andthe cylinder is made rigid by means of a light, but hard material,whereby a sutlieient resistance against the printing strokes isobtained.

Having now particularly described and ascertained the nature of my saidinvention and the manner in which the same is to be performed I declarethat what I claim is:

1. In a typewriting machine, the combination with a rockingtype-cylinder carrier and means to rock said carrier, of a typecylinderrotatable 011 said carrier, a pinion for rotating said type-cylinder, arack movable on said type-cylinder carrier and meshing with said pinion,a driver having a loose or pivotal engagement with said rack, and nvansfor moving said driver in either direction to different positions.

2. In a typewriting machine, the combination with a rockingtype-cylinder carrier, and means to rock said carrier, of a typecylinderrotatable on said carrier, a toothed sector pivoted to said carrier andadapted to rotate said type-cylinder, a pivot secured to said sector onits periphery, a driver engaging said pivot and means to move saiddriver in either direction to different positions.

In a typewriting machine, the combi nation of a rock-frame, a pluralityof key levers adapted to rock said frame on their depression, atype-cylinder carrier rigidly secured to said rock-frame, atype-cylinder rotatable on said carrier, a pinion for rotating saidtype-cylinder, a toothed. sector pivoted to said type-cylinder carrierand meshing with said pinion, a pivot secured to said sector on itsperiphery, a driver cngaging said pivot and means to move said driver ineither direction to different positions.

41-. In a typewriting machine, the combination, with a rockingtype-cylinder carrier and means to rock said carrier, of a rota tabletype-cylinder mounted on said carrier, a spindle rigidly secured to saidtype-cylinder, a pinion mounted on said spindle, a toothed sectormounted on said type-cylinder carrier and having engagement with saidpinion, and an actuating rod pivoted to said sector, said pivot and themeshing point of the sector with the pinion being located substantiallyin the axis of the fulcrum of the rocking type-cylii'lder carrier.

5. In a typewriting machine, the combination with a rockingtype-cylinder carrier and means for rocking said carrier, of atype-cylinder rotatable on said carrier, rack and pinion mounted on saidcarrier and adapted to rotate said type-cylinder, a plurality ofkey-levers, a frame adapted to be brought into different positions bysaid key levers, and a rod connecting said frame and said rack andhaving its direction of motion in each position substantially transverseto the axis of the fulcrum of said rocking type-cylinder carrier.

6. In a typewriting machine, the combination with a rockingtype-cylinder support, a type-cylinder, a plurality of keylevers andmeans operated by said keylevers to rotate said type-cylinder in itssupport, of a rocking frame extending crosswise below the key-levers andarranged to actuate said rotating means when rocked, and projections onsaid keylcvers having inclined surfaces and adapted to be brought intorocking engagement with said rocking frame, the engaging inclinedsurfaces extending from their respective key-levers to points at adistance from said rocking frame, whereby the latter is rocked duringthe last part of the depression of the keylevers.

7. In a typewriting machine, the combination, with a rockingtype-cylinder carrier and means for rocking said carrier, of a ty)e-cylinder rotatable and slidable on said carrier, means for supportingsaid typecylinder, means for shifting the supporting means, and meansfor arresting said shifting motion exactly at the instant when thecontact of the shifting means with the shifted supporting means reachesthe plane of the pivotal axis around which the rocking type-cylindercarrier swings.

8. In a typewriting machine, the combination with a rockingtype-cylinder sup port, a type-cylinder mounted on said support, thekey-levers, and means to rotate said type-cylinder in its support, of arocking frame adapted to be rocked by each of the key-levers, and a linkconnecting said rotating means and rocking frame, the connecting line ofthe pivots of said link substantially crossing the axis of the fulcrumof said type-cylinder.

9. In a typewriting machine, the combination with a type-cylinder, and arocking support therefor, of a rocking frame, means to transmit rotarymovement from the rocking frame to type-cylinder, arms rigidly connectedwith the rocking frame and the type-cylinder support respectively andlocated adjacent to each other in the normal position of the rockingframe and support, and a brake spring extending between said arms andadapted by its tension to follow the displacement of the arm of the rocking frame and to be brought back thereby against its tension, whereby abraking ac tion is exerted on said rocking frame.

10. In a typewriting machine, the combination of a tube forming the axleof the type-cylinder and extending through the same, a type-cylinderrotatable and slidable on said tubular axle, a spindle journaled in saidaxle and connected with said type-cylinder, and means for shifting saidspindle to different positions.

11. In a typewriting machine, the combination of a tubular type-cylinderaxle, a type-cylinder rotatable and slidable on said axle, said axleextending through the typecylinder, a spindle journaled in said tubularaxle, means for securing said spindle to said type-cylinder, and meansfor moving said spindle longitudinally and rotatively.

12. In a typewriting machine, the combination with a rockingtype-cylinder carrier and means to rock said carrier, of a tubulartype-cylinder axle secured to said carrier or forming part of it, atype-cylinder rotative and slidable on said axle, said axle extendingthrough the type-cylinder, means to rotate said type-cylinder, a spindlejournaled in said tubular axle and connected with said type-cylinder,and means to shift said spindle to different positions.

13. In a typewriting machine, the combination with a rockingtype-cylinder carrier and means adapted to rock said carrier, of atubular type-cylinder axle secured to said carrier, a type-cylinderrotatable and slidable on said axle, said axle extending through thetype-cylinder, a spindle journaled in said tubular axle, means forsecuring said spindle to said type-cylinder, and means for moving saidspindle longitudi nally and rotatively.

14:. In a typewriting machine, the combination with a rockingtype-cylinder carrier and means for rocking said carrier, of a tubulartype-cylinder axle secured to said carrier, a type-cylinder rotatableand slidable on said axle, means for rotating said typecylinder, aspindle journaled in said tubular axle, and connected with saidtypecylinder, a slide shiftably mounted on said type-cylinder carrierand adapted to sup port the lower end of said spindle, and means forshifting said slide to different positions.

15. In a typewriting machine, the combination of a type-cylindercarrier, a tubular axle rigidly secured to said carrier, a type cylinderrotatably and slidably mounted on said tubular shaft, a spindlejournaled in said shaft and secured to the type-cylinder, means forrotating said spindle, a slide shiftable on said type-cylinder carriersupporting the lower end of said spindle, flanges projecting laterallyon said slide to different distances and at different heights andshifting levers having cross-pins engaging said flanges.

16. In a t 1 aewritin machine the combi nation of a type-cylindercarrier, a tubular axle rigidly secured to said carrier, a typecylind-errotatably and slidably. mounted on said shaft, a spindle journaled insaid shaft and secured to the type-cylinder, means for rotating saidspindle, a slide shiftable on said type-cylinder carrier, an abutment onsaid carrier limiting the shifting position of said slide, flangesprojecting laterally from said slide to different distances and atdifferent heights, shifting levers each having a pin engaging one ofsaid flanges, one of said flanges having a slot adapted to engage on theshifting motion with the cross-pin of the shifting lever, and anabutment limiting the shifting of each lever.

17. In a typewriting machine, the combination of a rocking type-cylindercarrier, means to rock said carrier, a tubular axle rigidly secured tosaid carrier, a typecylinder rotatably and slidably mounted 011 saidshaft, a spindle jo-urnaled in said shaft and secured to thetype-cylinder, means for rotating said spindle, a slide shiftable onsaid type-cylinder carrier and connected with said type-cylinder, anabutment 011 said carrier limiting the shifting position of said slide,flanges projecting laterally from said slide to diflerent distances andat different heights, shifting levers each en gaging one of said flangesby means of crosspins, the engagement of said pins with said flangesbeing located, when in the shifting position, in the fulcrum of therocking typecylinder carrier, one of said flanges having a slot adaptedto engage on the smaller shifting motion with the cross-pin of theshifting lever causing said shifting motion, and an abutment limitingthe movement of said shifting lever.

18. In a typeWriting machine, the combination of a rocking type-cylindercarrier,

means for rocking said carrier, a tubular axle rigidly secured to saidcarrier, a typecylinder rotative and slidable on said shaft, a spindlejournaled in said shaft and secured to the type-cylinder, means forrotating said spindle, a slide shiftably mounted on said type-cylindercarrier and adapted to support the lower end of said spindle, flangesprojecting laterally on said slide to different distances and atdifferent heights, and shifting levers engaging said flanges bycrosspins, the points of engagement of said shifting levers and theflanges in their shifted position. being substantially located in theaxis of the fulcrum of the rocking typecylinder arrier.

1 In a typewriting machine, the combination, with a type-cylindercarrier, a tubular axle secured to said carrier, a rot-ative andslidahle type-cylinder mounted on said shaft, an actuating spindlejournaled in said shaft and secured to the type-cylinder, and means forrotating said spindle, of a slide shiftable on the type-cylinder carrierparallel to the type-cylinder shaft, shifting levers engaging saidslide, a foot slidably moui'ited on said slide engaging the lower end ofthe type-cylinder spindle, and keyoperated means to shift said foot onsaid slide.

20. in a typewriting machine, the combination, with a rockingtype-cylinder carrier, means to rock said carrier, a tubular axlesecured to said carrier, a rotative and slidable type-cylinder mountedon said shaft, an actuating spindle journaled in said shaft and securedto the typc-cylinder, and means for rotating said spindle, of a slideshiftable on the type-cylinder carrier parallel to the type-cylindershaft, shifting levers engaging said slide, a foot slidably mounted onsaid slide and engaging the lower end of the type-cylindcr spindle, andkey-operated means to shift said foot on said slide.

21. T11 a typewriting machine, the com bination with a type-cylindersupport and a type-cylinder slidably and rotatably mounted on saidsupport, of means to rotate said typecylinder, a slide mounted on saidtype-cylinder support, a foot shiftably mounted on said slide andadapted to sup port type-cylinder, a pair of links pivotally mounted onsaid slide and connected at their free ends by a rod to form a swingingparallelograminic frame, a link connecting said frame at one of its freepivots with. the foot, a bell crank lever engaging the swinging red ofsaid frame and adapted to be rocked by part of the key-levers, and aspring to hold said frame in its normal position.

22. In. a typcwriting machine, the combination, with a type-cylindercarrier, a rotative and shiftable type-cylinder mounted 011 saidcarrier, an. actuating spindle secured to said type-cylinder, means torotate said spindle, a slide shiftable on said carrier, means forshifting said slide to different positions, a foot slidablc on saidslide and engaging the lower end of said spindle, a pair of linkspivotally mounted on said slide and connected at their free ends to forma pivotal. parallelogrammie frame, a link con necting said frame at oneof its free pivots with the foot, and a key-actuated bell-crank leverengaging the swinging rod parallel with the spindle of said frame, andthereby, when operated, compressing the frame equally, regardless of theposition of the slide, and causing an always equal shifting motion ofsaid foot on said slide.

23. In a typewriting machine, the combination with a rockingtype-cylinder carrier and means to rock said carrier, of a typeeylinderrotative and slid-able on said carrier, means to rotate and means toshift said type-cylinder to different positions, a starwheel secured tosaid type-cylinder, a detent pivotally mounted in the frame of themachine and adapted to engage with said starwheel in its normal positionand in its shifted positions, and means to move said detent above itspivot toward said starwheel.

24. In a typewriting machine, the combination, with a rockingtype-cylinder carrier, means for rocking said carrier, a rotative andshiftable type-cylinder mounted on said carrier, an actuating spindlesecured to said type-cylinder, means for rotating said spindie, a slideshiftahle on said carrier, means for shifting said slide to differentpositions, a foot slidable on said slide and engaging the lower end ofsaid spindle, a pair of links pivotally mounted on said slide andconnected at their free ends by a rod to form a pivotalparallelogranunic frame, a link connecting said frame at one of its freepivots with the foot, and a key-actuated bellrcrank lever engaging theswinging rod of said frame, and thereby, when operated, conipressing theframe equally, whatever is the position of the slide, and causing analways equal shifting motion of at id foot and said slide.

25. In a typewriting machine, the combination with a type-cylinder andits rocking sijipport, and means to operate the same, of a springconnected to said rocking support and adapted to retract the same intoits normal position, said spring being so arranged relatively to therocking frame that in the normal position of the frame the direction ofits tension crosses the axis of the fulcrum of the rocking frame.

26. In a typewriting machine, the combination with a type-cylinder, itsrocking sup port, and a rocking positioning frame, of a spring connectedto said positioning frame and adapted to retract the same into itsnormal position, said retracting spring being so located relatively tothe positioning frame that in the normal position of the positioningframe the direction of its tension crosses the fulcrum of thepositioning frame.

27. In a typewriting machine, the combination, with the type-cylinder,the key-levers and the connecting rod for operating the former, of apositioning frame operated by the key-levers, said frame comprising twopivoted sections, links pivoted to and connecting said sections, and acommon pivot for said links abutting against said connecting rod.

28. In a typewriting machine, the combination, with the type-cylinder,the key-levers and the connecting rod for operating the former, of apositioning frame operated by the key-levers, said frame comprising twopivoted sections, links pivoted to and connecting said sections, acommon pivot for said links abutting against said connecting rod, andguide-plates having slots into which said pivot enters at its ends andby which it is guided concentrically with the pivotal connectionsbetween said links with said sections.

29. In a typewriting machine, the combination, with the type-cylinder,the key-levers and the connecting rod for operating the former, of apositioning frame operated by the key-levers, said frame comprising twopivoted sections, links pivoted to and connecting said sections, acommon pivot for said links abutting against said connecting rod, fixedsupports at the sides of said links, and hooks suspended from saidsupports and by which said pivot is guided in opposite directions.

In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

OTTO PFEIFFER.

Witnesses GRIPUS SoHULTzE, EUGEN CoHNrrz.

Copies of this patent may be obtained for five cents eah, by addressingthe Commissioner of Patents. Washington, D. 0.

